CN215054624U - Passive building flat roof waterproof and heat-insulating structure - Google Patents

Abstract

A passive building flat roof waterproof insulation structure comprises: waterproof heat preservation roofing, it includes from bottom to top in proper order: the system comprises a reinforced concrete structure layer, a steam channel layer, a waterproof steam-insulating layer, a first heat-insulating layer of a roof, a waterproof hydrophobic layer, a second heat-insulating layer of the roof, a first waterproof layer and a second waterproof layer; locate the parapet of reinforced concrete structural layer one side perpendicularly, its one side from interior to exterior that is close to waterproof heat preservation roofing is equipped with in proper order: first tie coat, the first heat preservation of parapet, self-adhesion waterproof layer, second tie coat, parapet second heat preservation, one side from interior to exterior of keeping away from the waterproof heat preservation roofing is equipped with in proper order: the first rock wool strip, the second rock wool strip, the reinforced glass fiber net and the large-surface glass fiber net. This waterproof insulation structure makes heat preservation water-proof effects reach the best through doing special treatment to parapet and roofing wall's heat preservation waterproof construction, avoids the indoor environment to cause the emergence of phenomenon such as indoor humidity mildenes and rot because of the influence of interior external environment to the comfort level of living has been improved.

Description

Passive building flat roof waterproof and heat-insulating structure

[ technical field ] A method for producing a semiconductor device

The utility model relates to a insulation construction, concretely relates to passive form building flat roof waterproof insulation structure.

[ background of the invention ]

At present, in order to prevent the indoor environment from being soaked or wetted by rainwater and the like after a long time, a waterproof layer needs to be arranged on the wall surface, so that the indoor environment is prevented from being mildewed or leaking water due to the rainwater; in order to avoid the indoor environment absorbing or dissipating heat, an insulating layer is needed. Traditional waterproof layer generally sets up in heat preservation top or below, and the heat preservation adopts the preparation of prefabricated panel more, because the characteristic of present waterproof layer, can appear the water-proof effects not add after a long time, and the heat preservation intakes, through freeze thawing cycle back, can make the heat preservation sheet layer lose intensity to lead to the water-proof heat preservation effect not good, can in the too much back of indoor steam, indoor can produce phenomenons such as mildenes and rot, and then make living comfort level greatly reduced.

[ Utility model ] content

In order to solve the problem, the utility model provides a flat roofing waterproof insulation structure of passive form building, it is through being special treatment to parapet and roofing wall's heat preservation waterproof construction, makes heat preservation water-proof effects reach the best, avoids the indoor environment to cause the emergence of phenomenons such as indoor humidity mildenes and rot because of the influence of interior external environment to the comfort level of living has been improved.

The utility model discloses a realize through following technical scheme, provide a passive form building flat roof waterproof insulation structure, include:

waterproof heat preservation roofing, it includes from bottom to top in proper order: the system comprises a reinforced concrete structure layer, a steam channel layer, a waterproof steam-insulating layer, a first heat-insulating layer of a roof, a waterproof hydrophobic layer, a second heat-insulating layer of the roof, a first waterproof layer and a second waterproof layer; one side of the reinforced concrete structure layer is provided with an exhaust pipe, and the exhaust pipe is inserted into the second waterproof layer, the first waterproof layer, the second roof insulating layer, the waterproof hydrophobic layer, the first roof insulating layer, the waterproof steam-insulating layer and the steam channel layer in sequence and then is contacted with the side surface of the reinforced concrete structure layer; in the utility model discloses in, steam channel layer adopts PTU to take the waterproof book of steam channel SBS modified asphaltThe roof heat insulation structure is characterized in that the waterproof steam-insulation layer is made of an SKB (cold-proof) alkali-resistant aluminum foil reinforcing rib glass fiber tire self-adhesive SBS (styrene butadiene styrene) modified asphalt steam-insulation coiled material, the first heat insulation layer and the second heat insulation layer of the roof are high-density graphite polyphenyl plates, the requirement for meeting the compression strength is guaranteed, the heat insulation effect is also taken into consideration, and the density range of the high-density graphite polyphenyl plates is 25kg/m³～30kg/m³The first waterproof layer is made of a 3-thick PE surface glass fiber base modified asphalt self-adhesive waterproof coiled material, the upper surface of the 3-thick PE surface glass fiber base modified asphalt self-adhesive waterproof coiled material is a PE film, and the lower surface of the 3-thick PE surface glass fiber base modified asphalt self-adhesive waterproof coiled material is a self-adhesive asphalt isolating film; the second waterproof layer is made of a 4-thick plate rock face glass fiber reinforced polyester tire APP/SBS double-sided modified asphalt waterproof coiled material;

locate the parapet of reinforced concrete structural layer one side perpendicularly, its one side from interior to exterior that is close to waterproof heat preservation roofing is equipped with in proper order: first tie coat, the first heat preservation of parapet, self-adhesion waterproof layer, second tie coat, parapet second heat preservation, one side from interior to exterior of keeping away from the waterproof heat preservation roofing is equipped with in proper order: the roof heat insulation system comprises a first rock wool strip, a second rock wool strip, a reinforced glass fiber net and a large-surface glass fiber net, wherein a steam channel layer and a waterproof steam-proof layer are sequentially arranged between a reinforced concrete structure layer and a first heat insulation layer of a roof and are upwards adhered between a parapet and a first bonding layer along a parapet wall body.

Particularly, one side face, far away from the reinforced concrete structure layer, of the first heat preservation layer of the roof is an inclined plane, one side, far away from the parapet, of the first heat preservation layer of the roof is higher than one side, close to the parapet, of the first heat preservation layer of the roof, and the end face of the first heat preservation layer of the parapet is in contact with the side face of the first heat preservation layer of the roof.

In particular, grooves are uniformly formed in one side face of the second heat-insulating layer of the roof.

Particularly, the direction of the groove is consistent with the drainage direction of the roof, and a groove is arranged at the width of 50mm, the depth of 10mm and the interval of 50 mm.

Particularly, the adhering height of the steam channel layer and the parapet wall is 300mm, round cold self-adhesive strips are discontinuously arranged on the lower surface of the steam channel layer, and the total area of the round cold self-adhesive strips accounts for 50% of the total area of the lower surface of the steam channel layer.

Particularly, the second waterproof layer and the end part of the first waterproof layer are flatly paved by staggered joints of 500mm, and the lap joint width of the long edge of the first waterproof layer is more than or equal to 100 mm; the lapping width of the short side is more than or equal to 100mm, the lapping width of the long side of the second waterproof layer is more than or equal to 100mm, and the lapping width of the short side is more than or equal to 100 mm.

Particularly, the first rock wool strips are adhered by using a point frame method, the second rock wool strips are fully adhered on the first rock wool strips by using a strip adhesion method, and the vertical lap joint width of the reinforced glass fiber net and the large-surface glass fiber net is more than or equal to 100 mm.

Particularly, the reentrant corner position of second heat preservation is equipped with an L type prefabricated graphite polyphenyl board, and this L type prefabricated graphite polyphenyl board one side is located between waterproof hydrophobic layer and the first waterproof layer, and the second tie coat is located to the opposite side one side of keeping away from the parapet, and this L type prefabricated graphite polyphenyl board reentrant corner position department is the radian and is handled.

In particular, the method also comprises the following steps: the water falling port is inserted into the parapet wall body on the other side, the contact position of the water falling port and the parapet wall body sequentially passes through a pre-pressing sealing strip and a building sealant from inside to outside to be connected, one side of the water falling port close to the parapet wall second heat insulation layer extends upwards to form a wall body, the wall body is arranged between a first waterproof layer and the parapet wall second heat insulation layer, and the first waterproof layer and the second waterproof layer are respectively adhered to the inner wall of the water falling port.

In particular, a water collecting groove which has the same width with the width of the water falling port and is communicated with the groove is arranged on one side of the first heat preservation layer of the roof close to the first heat preservation layer of the parapet wall, the water collecting tank is positioned at one side of the first heat preservation layer of the parapet wall, which is far away from the parapet wall, and a drain pipe is inserted in the water collecting tank, the other end of the drain pipe extends out of a drain port at the side of the water outlet of the downpipe after the second heat-insulating layer of the roof extends out, the end part of the second heat-insulating layer of the roof close to the parapet wall is designed into a three-layer ladder shape, the end part of the water falling port is lapped on the ladder at the lowest end, and the contact gap between the water falling port and the second heat-insulating layer of the roof is filled with polyurethane foaming glue, the end face of the end part and the end face of the ladder are filled with waterproof sealant, the middle ladder surface is pasted with an additional waterproof layer, and the additional waterproof layer is arranged between the first waterproof layer, the second waterproof layer and the inner wall of the water falling port.

The utility model provides a passive building flat roof waterproof heat preservation structure, which can discharge the water vapor generated in the room in time by performing special treatment on the heat preservation and the water prevention of the reinforced concrete structure layer and the parapet wall, and avoid the phenomena of damage to the building or bulging, failure and the like of a waterproof vapor-barrier film caused by excessive water vapor in the wall; meanwhile, the downpipe is subjected to waterproof treatment, so that the phenomena of rainwater backflow, wall body infiltration along gaps and the like can be prevented; and when the building is built, the building is overlapped and pasted, so that gaps and leakage are prevented, the failure of the waterproof heat-insulating layer due to internal water vapor can be avoided, and the waterproof efficiency of the house is improved.

[ description of the drawings ]

Fig. 1 is a schematic node diagram of the waterproof and heat-insulating structure of the flat roof of the passive building of the present invention;

fig. 2 is a schematic diagram of a water falling node of the waterproof and heat-insulating structure of the flat roof of the passive building of the present invention;

fig. 3 is the utility model relates to a structural schematic of second heat preservation among passive form building flat roof waterproof insulation structure.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in detail through specific embodiments below.

Referring to fig. 1-3, the present invention provides a passive building flat roof waterproof and thermal insulation structure, which comprises:

waterproof heat preservation roofing, it includes from bottom to top in proper order: the system comprises a reinforced concrete structure layer 1, a steam channel layer 2, a waterproof steam-insulating layer 3, a first roof heat-insulating layer 4, a waterproof hydrophobic layer 5, a second roof heat-insulating layer 6, a first waterproof layer 7 and a second waterproof layer 8; one side of the reinforced concrete structure layer 1 is provided with an exhaust pipe, and the exhaust pipe is inserted into a second waterproof layer 8, a first waterproof layer 7, a second roof insulating layer 6, a waterproof hydrophobic layer 5, a first roof insulating layer 4, a waterproof vapor-barrier layer 3 and a steam channel layer 2 in sequence and then is contacted with the side surface of the reinforced concrete structure layer 1;

locate the parapet wall body on 1 one side of reinforced concrete structure layer perpendicularly, its one side from interior to exterior that is close to waterproof heat preservation roofing is equipped with in proper order: parapet 15, first tie coat 14, the first heat preservation of parapet 13, self-adhesion waterproof layer 12, second tie coat 11, parapet second heat preservation 10, one side from interior to exterior of keeping away from the waterproof heat preservation roofing is equipped with in proper order: the first rock wool strip 16, the second rock wool strip 17, the reinforcing glass fiber net 18 and the large-surface glass fiber net 19, wherein the steam channel layer 2 and the waterproof steam-proof layer 3 are sequentially arranged between the reinforced concrete structure layer 1 and the first heat-preservation layer 4 of the roof and are upwards adhered between the parapet wall 15 and the first bonding layer 14 along the parapet wall to form an L shape.

Particularly, a slope is formed on one side surface of the first roofing heat preservation layer 4 away from the reinforced concrete structure layer 1, one side surface of the first roofing heat preservation layer 4 away from the parapet wall 15 is higher than one side surface of the first roofing heat preservation layer close to the parapet wall 15, and the end surface of the first parapet wall heat preservation layer 13 is in contact with the side surface of the first roofing heat preservation layer 4; so design can form a drainage slope after paving and pasting first heat preservation 13 of completion parapet, need not to use the mortar to look for the slope and handle to guarantee dry job construction, practiced thrift man-hour.

In particular, a groove 28 is uniformly arranged on one side surface of the second heat-insulating layer 6 of the roof, and the groove 28 faces one side of the first heat-insulating layer; in the utility model discloses in, the direction that the recess set up is non-fixed position, and its orientation is unanimous with the drainage slope direction, only need put on the waterproof hydrophobic layer can, later can form the water drainage tank of a certain amount intercommunication each other to can make the moisture in the wall in time discharge, prevent indoor phenomenon of mildening and rot because of the humidity appears.

Particularly, the direction of the groove 28 is consistent with the drainage direction of the roof, and a groove 28 is arranged at the width of 50mm, the depth of 10mm and the interval of 50 mm; by the design, the strength of the second heat-insulating layer of the roof is prevented from being reduced due to excessive grooves while the heat-insulating effect of the second heat-insulating layer of the roof is ensured.

Particularly, the adhering height of the steam channel layer 2 and the parapet wall 15 is 300mm, circular cold self-adhesive strips are discontinuously arranged on the lower surface of the steam channel layer 2, and the total area of the circular cold self-adhesive strips accounts for 50% of the total area of the lower surface of the steam channel layer 2; so design, can form vertically and horizontally staggered's steam passageway through circular cold self-adhesive tape, through predetermined blast pipe, in time effectively with reinforced concrete structural layer 1 because of the moisture content height the vapor that produces when being heated and the steam that gets into the waterproof layer from indoor roof boarding of permeating discharges, avoids inside steam to lead to waterproof heat preservation inefficacy to the waterproof efficiency in house has been improved.

Particularly, the second waterproof layer 8 and the end part of the first waterproof layer 7 are flatly paved by staggered joints of 500mm, and the lap joint width of the long edge of the first waterproof layer 7 is more than or equal to 100 mm; the lap joint width of the short side is more than or equal to 100mm, the lap joint width of the long side of the second waterproof layer 8 is more than or equal to 100mm, and the lap joint width of the short side is more than or equal to 100 mm; so design, can guarantee the second in order to guarantee the effective overlapping between second waterproof layer 8, the first waterproof layer 7, avoid overlap joint width undersize and make the water that produces after being heated permeate through the gap between second waterproof layer 8, the first waterproof layer 7, and influence the water-proof effects in house.

Particularly, the first rock wool strips 16 are adhered by using a point-frame method, the second rock wool strips 17 are fully adhered to the first rock wool strips 16 by using a strip adhesion method, and the upper and lower lap joint width of the reinforced glass fiber net 18 and the large-surface glass fiber net 19 is more than or equal to 100 mm; so design, but reinforcing glass fiber net horizontal direction butt joint sets up the fire prevention median in the parapet outer wall outside, can guarantee that the roofing heat preservation is same material, effectively avoids the different panel at the inconsistent fracture that leads to of shrink of temperature stress effect, has further improved water-proof effects and heat preservation effect.

Particularly, an L-shaped prefabricated graphite polystyrene board is arranged at an internal corner position where the second roof insulating layer 6 and the second parapet insulating layer 10 are clamped, one side edge of the L-shaped prefabricated graphite polystyrene board is arranged between the waterproof hydrophobic layer 5 and the first waterproof layer 7, the other side edge of the L-shaped prefabricated graphite polystyrene board is arranged at one side, far away from the parapet wall 15, of the second bonding layer 11, and radian processing is carried out at the internal corner position of the L-shaped prefabricated graphite polystyrene board; according to the design, the L-shaped prefabricated graphite polystyrene board can effectively avoid the problem that the waterproof coiled material is easy to crack at the internal corner position when being pasted, is a whole, cannot crack due to different linear shrinkage coefficients of two materials, cannot leave a through seam, and is directly constructed by the L-shaped board without increasing detail processing procedures, so that the working efficiency is improved.

In particular, the method also comprises the following steps: the water pipe 21 is inserted into the parapet wall body on the other side, the contact position of the water pipe 21 and the parapet wall body is sequentially connected through a pre-pressing sealing strip 26 and building sealant 27 from inside to outside, one side of the water pipe 21 close to the parapet second heat insulation layer 10 extends upwards to form a wall body, the wall body is arranged between the first waterproof layer 7 and the parapet second heat insulation layer 10, and the first waterproof layer 7 and the second waterproof layer 8 are respectively adhered to the inner wall of the water pipe 21; so design can improve the leakproofness between pipe in the water and the parapet wall body to prevent that water from getting into the wall body along the gap, make wall body humidity too big, and cause indoor humidity to milden and rot.

Particularly, a water collecting tank 22 which has the same width as that of the downpipe 21 and is communicated with the groove is arranged on one side, close to the first heat preservation layer 13 of the parapet, of the first heat preservation layer 4 of the roof, the water collecting tank 22 is arranged on one side, far away from the parapet, of the first heat preservation layer 13 of the parapet, a layer of polyurethane waterproof coating is coated on the surface of the water collecting tank 22, a drainage pipe 20 is inserted into the water collecting tank 22, a drainage port extends out from the water outlet side of the downpipe 21 after the second heat preservation layer 6 of the roof extends out, the end part, close to the parapet 15, of the second heat preservation layer 6 of the roof is designed to be a three-layer ladder shape, the end part of the downpipe 21 is lapped on the ladder at the lowest end, a contact gap between the downpipe 21 and the second heat preservation layer 6 of the roof is filled with polyurethane foaming adhesive 23, the end surfaces of the end part and the ladder are filled with waterproof sealant 24, and an additional waterproof layer 25 is adopted for adhering the middle ladder surface, the additional waterproof layer 25 is arranged between the first waterproof layer 7, the second waterproof layer 8 and the inner wall of the downpipe 21; by the design, the waterproof sealing performance between the downpipe and the wall body can be further improved, meanwhile, as can be seen from the figure, the downpipe is arranged in a downward inclined mode, the phenomenon of rainwater guiding pipes can be avoided, the upper end of the drainpipe extends into the downpipe, the joint part is tightly filled, waterproof treatment is well performed, the drainpipe 20 consists of a sleeve and capillary tubes, and the sleeve is wrapped on the outer sides of the capillary tubes to play a role in protection; the capillary tube is a thin tube with the inner diameter equal to or less than 1 millimeter, has a drainage function, has the principle of capillary phenomenon, and refers to the phenomenon that liquid rises or falls in the inner side of a thin tube-shaped object due to the difference between cohesive force and adhesive force and overcomes the gravity force, and is not limited by atmospheric pressure.

In the utility model, the first heat preservation layer of the roof, the second heat preservation layer of the roof, the first heat preservation layer of the parapet and the second heat preservation layer of the parapet are made of the same material, so that the cracking or the crack caused by the shrinkage deformation generated by the temperature stress when two heat preservation plates are used at the internal corner of the junction of the parapet and the roof can be effectively avoided, the first heat preservation layer of the parapet and the second heat preservation layer of the parapet are constructed by adopting a full-bonding method, and no cavity is reserved between the first heat preservation layer of the parapet and the parapet to prevent water seepage; meanwhile, water vapor in the building is unavoidable and can not be completely discharged, partial water vapor can be generated in daily life and living, the reinforced concrete structure layer has certain air permeability, and therefore the steam channel layer 2 and the exhaust pipe 9 are arranged, so that when water vapor appears in the reinforced concrete structure layer, the water vapor can be discharged, and the water vapor is prevented from causing damage to the building or causing the water-proof steam-isolating membrane to bulge and lose efficacy for a long time.

Claims (10)

1. The utility model provides a waterproof insulation construction of passive form building flat roof which characterized in that includes:

waterproof heat preservation roofing, it includes from bottom to top in proper order: the water-proof and steam-proof roof comprises a reinforced concrete structure layer (1), a steam channel layer (2), a water-proof and steam-proof layer (3), a first roof heat-insulating layer (4), a water-proof hydrophobic layer (5), a second roof heat-insulating layer (6), a first waterproof layer (7) and a second waterproof layer (8); one side of the reinforced concrete structure layer (1) is provided with an exhaust pipe, and the exhaust pipe is inserted into the second waterproof layer (8), the first waterproof layer (7), the second roof insulating layer (6), the waterproof hydrophobic layer (5), the first roof insulating layer (4), the waterproof steam-insulating layer (3) and the steam channel layer (2) in sequence and then is contacted with the side surface of the reinforced concrete structure layer (1);

locate the parapet wall body of reinforced concrete structural layer (1) one side perpendicularly, its one side from interior to exterior that is close to waterproof heat preservation roofing is equipped with in proper order: parapet (15), first tie coat (14), parapet first heat preservation (13), self-adhesion waterproof layer (12), second tie coat (11), parapet second heat preservation (10), one side from interior to exterior of keeping away from the waterproof heat preservation roofing is equipped with in proper order: the first rock wool strip (16), the second rock wool strip (17), the reinforcing glass fiber net (18) and the large-surface glass fiber net (19), wherein the steam channel layer (2) and the waterproof steam-proof layer (3) are sequentially arranged between the reinforced concrete structure layer (1) and the first heat-preservation layer (4) of the roof and are upwards adhered between the parapet wall (15) and the first adhesive layer (14) along the parapet wall body.

2. The flat roof waterproof and heat-insulating structure for the passive building as claimed in claim 1, wherein a side of the first roofing heat-insulating layer (4) far away from the reinforced concrete structure layer (1) forms a slope, the side of the first roofing heat-insulating layer (4) far away from the parapet wall (15) is higher than the side close to the parapet wall (15), and the end face of the first parapet wall heat-insulating layer (13) is in contact with the side of the first roofing heat-insulating layer (4).

3. The flat roof waterproof and heat-insulating structure for the passive building as claimed in claim 1, characterized in that a groove (28) is uniformly formed on one side surface of the second heat-insulating layer (6) of the roof, and the groove (28) faces to one side of the first heat-insulating layer.

4. The passive building flat roof waterproof and heat insulation structure is characterized in that the direction of the groove (28) is consistent with the roof drainage direction, and a groove (28) is arranged at the position, 50mm wide, 10mm deep and 50mm spaced, of the groove (28).

5. The passive building flat roof waterproof and heat-insulating structure is characterized in that the adhering height of the steam channel layer (2) and the parapet wall (15) is 300mm, circular cold self-adhesive strips are discontinuously arranged on the lower surface of the steam channel layer (2), and the total area of the circular cold self-adhesive strips accounts for 50% of the total area of the lower surface of the steam channel layer (2).

6. The passive building flat roof waterproof and heat insulation structure according to claim 1, wherein the second waterproof layer (8) and the first waterproof layer (7) are tiled 500mm in end staggered joint, and the long-edge lap joint width of the first waterproof layer (7) is more than or equal to 100 mm; the lap joint width of the short side is more than or equal to 100mm, the lap joint width of the long side of the second waterproof layer (8) is more than or equal to 100mm, and the lap joint width of the short side is more than or equal to 100 mm.

7. The waterproof and heat-insulating structure for the flat roof of the passive building as claimed in claim 1, wherein the first rock wool strips (16) are adhered by a point-frame method, the second rock wool strips (17) are fully adhered to the first rock wool strips (16) by a strip adhesion method, and the upper and lower lap joint width of the reinforced glass fiber net (18) and the large-surface glass fiber net (19) is more than or equal to 100 mm.

8. The flat roof waterproof and heat-insulating structure of the passive building as claimed in claim 1, wherein an L-shaped prefabricated graphite polystyrene board is disposed at an internal corner position where the second roof heat-insulating layer (6) and the second parapet wall heat-insulating layer (10) are sandwiched, one side of the L-shaped prefabricated graphite polystyrene board is disposed between the waterproof hydrophobic layer (5) and the first waterproof layer (7), the other side of the L-shaped prefabricated graphite polystyrene board is disposed at a side of the second adhesive layer (11) away from the parapet wall (15), and the internal corner position of the L-shaped prefabricated graphite polystyrene board is processed by radian.

9. The waterproof and heat-insulating structure for the flat roof of the passive building as claimed in claim 1, further comprising: the water pipe (21) is inserted into the parapet wall body on the other side, the contact position of the water pipe (21) and the parapet wall body sequentially passes through the pre-pressing sealing strip (26) and the building sealant (27) from inside to outside to be connected, one side, close to the parapet second heat insulation layer (10), of the water pipe (21) extends upwards to form a wall body, the wall body is arranged between the first waterproof layer (7) and the parapet second heat insulation layer (10), and the first waterproof layer (7) and the second waterproof layer (8) are respectively adhered to the inner wall of the water pipe (21).

10. The passive building flat roof waterproof and heat-insulating structure is characterized in that one side, close to the first heat-insulating layer (13) of the parapet, of the first heat-insulating layer (4) of the roof is provided with a water collecting tank (22) which has the same width as that of a water falling pipe (21) and is communicated with the groove, the water collecting tank (22) is positioned on one side, away from the parapet, of the first heat-insulating layer (13) of the parapet, a water discharging pipe (20) is inserted into the water collecting tank (22), the other end of the water discharging pipe (20) extends out of the water outlet side of the water falling pipe (21) after the second heat-insulating layer (6) of the roof extends out, the end, close to the parapet (15), of the second heat-insulating layer of the roof is provided with a three-layer ladder shape, the end of the water falling pipe (21) is overlapped on the ladder at the lowest end, and a contact gap between the water falling pipe (21) and the second heat-insulating layer (6) of the roof is filled with polyurethane foaming adhesive (23), The end face of tip and ladder adopts waterproof sealant (24) to fill, and middle ladder face adopts additional waterproof layer (25) to paste, additional waterproof layer (25) are located between first waterproof layer (7), second waterproof layer (8) and pipe in the water (21) inner wall.

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